Max Execution Timeouts with Defender

The site is very sluggish in the admin. Scans happen but they seem to take forever. I thought I'd try and remove the plugin and reinstall but I just get timeouts whenever I try to uninstall. If I just rename the plugin folder it obviously uninstalls but then I can't reinstall because of the timeouts. No other plugin does this. I've seen this same issue happen over many of my sites so I'm not sure if its environmental or a plugin issue. I use Siteground VPS as a host.